The ________ method provides an estimate of the CFUs (colony-forming units) in a sample.

A. Coulter-counter
B. viable plate-count
C. streak-plate
D. turbidity
E. direct microscopic-count


Answer: B

Biology & Microbiology

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What type of flower should you plant in your garden if you are particularly interested in attracting butterflies?

A. Purple, tubular-shaped flowers with a light floral scent. B. Pendulous red flowers that are open day and night with no scent. C. White day-blooming flowers with abundant pollen and a strong floral scent. D. Yellow flowers with abundant pollen and nectar and a strong floral scent. E. White, night-blooming flowers with a strong floral scent.

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In paralytic polio, which structures are damaged?

A. Brain stem B. Anterior horn cells C. Peripheral nerves D. Diaphragm E. Sensory nerves

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In a 32-cell stage tunicate embryo, if the vegetal marginal cells lack a functional FGF receptor, which structure(s) will fail to develop? (Select all that apply)A) notochordB) mesenchymeC) muscleD) nerve cord

What will be an ideal response?

Biology & Microbiology